Carbureter.



Patented Dec. 15, 1914.

Figs.

inundar HORACE T. THOMAS, 01E LANSING', MICHIGAN.

CARBURETER.

Specification of Letters Patent.

Patented nee. 15,1914.

application sied october 2v, ione. -serial No. 524,868.

T all whom it may concern:

lle it known that I, .Hennen T. THoMAs, a citizen of the United States, residing at Lansing, county of lVayne, State of Michigan, have invented a certain new and useful Improvement in Carbureters, and declare the following to be a full, clear, and exact description of tne same, such as'Will enable others skilled in the art to which it pertains to make and use the saine, reference being had to the accompanying drawings, which form a part of this specification.

My invention relates to carbureters and has for its object the provision of a carbureter giving a perfect fuel mixture at all practical speeds and climatic conditions. attain. this object in the device illustrated in the accompanying drawings, in Which,-

'Figure l, is a central section. Fig. 2, is a detail of the adjustable Venturi tube. Fig.

, 3, is a detail View ot a part ot the mechanism for adjusting the Venturi tube. Fig. 4,'is a View of the parts shown in Fig. 3,

` looking from the right of the latter. Fig. 5,

is a detail section on the line 5,75, Fig. l.

A. is the reservoir containing the hydro-v carbon liquid.

B is a float in the reservoir A..

C is the valve by which the supply of liquid to the reservoir A. is regulated through the medium of the float B in any usual Way.

D, is the supply passage controlled by the valve C.

F is a passage leading from the reservoir A, adapted to convey a liquid to a delivery nozzle H havinga fixed terminal opening.

G is an air passage in which is located the delivery nozzle H.

1 is a Venturi tube fitting and adapted to slide in the passage G. The bore of the tube I is of varying diameter, and the delivery opening or mouth of the nozzle llv is located in the bore of the tube I. By moving the l tube I away from the nozzle Il the larger part of the bore is brought adjacent to the delivery opening ot said nozzle, and by Inoving said tube in the other direction the narrowcr portion of the bore of said tube is brought adjacent to the delivery opening of the nozzle H.

i is a guoove formed around the upper edge of the tube I.

M is a metal cylinder fitting into a casing N, and extending with its axis at right angles to that of the tube l'.

m is a pin extending from the inner end of the cylinder M eccentric to said cylinder, and engaging in the groove i.

Z) is a slot ormedtransversely across the cylinder M from its upper surface and near the outer end of said cylinder. llhe casing N is provided with a slot n in its wall eirtending in a plane parallel to the axis of said cylinder.

l a is a bolt passing from side to side through the casing N and across the slot n, and adapted to draw the sides of the casing N together to clamp the cylinder M in place. The bolt a passes into the slot b, so that the cylinder M is thereby prevented from longitudinal movement.

o is a slot in the outer end of the cylinde M adapted to receive a screw-driver. By turning the cylinder M about its axis the Venturi tube I is adjusted to different positions in the passage G, and may be fixed in its adjusted position by clampin said cylinder in the casing N by means o the bolt a. The air passage G is open to the outer air at its lower end, and at its upper end opens into a chamber g which communicates with a passage P adapted to be connected to the intake of an internal combustion engine..

p is a throttle valve in the passage P.

J is an air passage opening at its lower end to the outer air, and at its upper end to the chamber g.

Q is a disk valve normally closing the pasage J, and adapted to open into the charn-- er g.

g is a spring pressing the disk valve Q, upon its seat surrounding the entrance from the passage J into thechaniber g. i

K is aspraying nozzle havinga delivery aperture in the passage J, and communicating by a passage 7c with the reservoir A.

L is a needle valve adapted to control the rate at which liquid passes to the delivery end of the nozzle K.

In carbureters using spraying nozzles, a nozzle having a flxedopening used in conjunction With a surrounding Venturi tube is more sensitive to changes 1n the speed of the motor than a nozzle of the adjustable needle type. The objection to this Vfixed opening type of nozzle is that it is not readily adjustable to adapt it to climatic conditions or errors in worlmianship. @ne object of my invention is to provide this adjustment by shifting the position of the Venturi tube relative to the fixed jet, thereby giving the desired regulation, the mechanism not being` necessarily as shown in the sketch, but. any means whereby this obj ect is accomplished. in. order to secure a carbureting device that Will produce :i perfect mixture at very low motor speeds, it is necessary to have the opening in the Venturi tube surrounding the fuel jet quite restricted, in

justment is that suitable When the throttle or gate valve is nearly closed. As the veloeity of the motor increases, clue to opening the gate or throttle, a greater proportion of uel is supplied than required for a' per'iect mixture. ln order to supply the required uniiount of nir, an automatic valve Q; is provid-ed, this valve being held to its seat by an adjustable spring g. I thus provide for the proper `mixture for medium or ordinary speeds. is the velocity of the motor vtui-ther increases, the fuel fed by the )et H is inaclequate to properly supply the air passing the valve Q. A second jet is thereorprovided for by the n ozzle K opening into `the tube J, this jet being adpistable by the needle valve L. This latter`ad justnient provides *for adapting the apparatus to variations in the tension of the spring' g and provides a third adjustment for high speed or open gate work or for the operation of the engine when the throttle or gate valve is Wide open.

Claims l. The combination o a passage Cr, a

VVenturi tube adapted to reciprocate iu said "nbination of a passage G, a flepted to reciprocate in said passage, a iii al delivery nozzle H in said tube, a cylin' cal piece M adapted to rotete in a casing l' iocated With .its axis at right angles to said tubes, an eccentric pin m extending from the piece M and engag ing said tube, a bolt for contracting the Walls of said casing, for the l'iurpose ch.- scribed, the piece Y'ii being provided with e ging in the slot in the bolt b, said bolt enga piece M.

In testimony' whereof, l sign this speciication m the presence of two witnesses.

I HR-. E rl?. 'HEER/ULS.

.Witnessesz Drum M. Penser:- E. F. Perm. 

